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Reports passing a non-empty string as the <code>$enclosure</code> parameter of the CSV-related methods and functions:
  <ul>
    <li><code>SplFileObject::setCsvControl()</code></li>
    <li><code>SplFileObject::fputcsv()</code></li>
    <li><code>SplFileObject::fgetcsv()</code></li>
    <li><code>fputcsv()</code></li>
    <li><code>fgetcsv()</code></li>
    <li><code>str_getcsv()</code>.</li>
  </ul>
<p>
  Passing of a non-empty string as the <code>$enclosure</code> parameter is
  <a href="https://wiki.php.net/rfc/deprecations_php_8_4#deprecate_proprietary_csv_escaping_mechanism">deprecated since PHP 8.4</a>.
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